Just replaced CV boots on a Toyota 4X4 and used split boots from Autozone. Take your old boot, if available, or measure the circumference of each end and see if they can match up a boot for you. The metal strap that comes with them is kind of hard to get tightened properly, so I used a large zip tie and trimmed off the excess. Be sure to pack the joint as best you can with CV joint grease before putting the boot on.

Tim